WD Western Digital Purple 4TB Surveillance 3.5 Inch SATA 6 Gb/s Hard Disk Drive with Allframe 4K Technology - 180TB/yr, 64MB Cache, 5400rpm - WD40PURZ

With IntelliSeek technology, WD Purple drives are able to calculate optimum seek speeds; this keeps power consumption low so ambient noise and vibrations are at a minimum

With a high workload rating WD Purple is designed to handle the distinct demands of contemporary video surveillance DVR and NVR systems

The WD Purple has wide compatibility along with seamless integration

WD Purple drives have been engineered specifically for the high demands of high temperature, 24/7 surveillance systems

From one of the worldwide leader in the storage industry, WD Purple is engineered for quality video playback when you need it most

WD Purple drives are optimized to support up to 64 cameras, giving you flexibility to upgrade or expand your security system

With a wide range of industry-leading enclosures and chipsets supported, you're sure to find the configuration and compatibility that's right for your NVR

Low power consumption is a must in a high-temperature, always-on surveillance environment; IntelliSeek technology helps reduce damaging ambient noise and vibrations